Σχόλια στο Κανονικά πολύγωνα http://kolount.wordpress.com/2009/05/07/%ce%ba%ce%b1%ce%bd%ce%bf%ce%bd%ce%b9%ce%ba%ce%ac-%cf%80%ce%bf%ce%bb%cf%8d%ce%b3%cf%89%ce%bd%ce%b1/ και λύσεις Thu, 17 Dec 2009 13:33:03 +0000 http://wordpress.com/ hourly 1 Από: Mihalis Kolountzakis http://kolount.wordpress.com/2009/05/07/%ce%ba%ce%b1%ce%bd%ce%bf%ce%bd%ce%b9%ce%ba%ce%ac-%cf%80%ce%bf%ce%bb%cf%8d%ce%b3%cf%89%ce%bd%ce%b1/#comment-966 Mihalis Kolountzakis Wed, 13 May 2009 20:28:57 +0000 http://kolount.wordpress.com/?p=821#comment-966 <b>Υπόδειξη:</b> Αν $latex \zeta_N = e^{2\pi i/N}$ υπολογίστε το άθροισμα $latex S(m) = \sum_{k=0}^{N-1} \zeta_N^{km},\ \ \ (m=0, 1, \ldots, N-1)$. Υπόδειξη:

Αν \zeta_N = e^{2\pi i/N} υπολογίστε το άθροισμα

S(m) = \sum_{k=0}^{N-1} \zeta_N^{km},\ \ \ (m=0, 1, \ldots, N-1).

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